Solar is pretty ubiquitous already in a lot of places… Around here (Australia), more than 1/3rd of homes have solar and plenty of commercial premises. The effi

Solar is pretty ubiquitous already in a lot of places… Around here (Australia), more than 1/3rd of homes have solar and plenty of commercial premises. The efficiency doesn’t matter much, it’s just the cost. Most people don’t pack as much solar on their roof as they can possibly fit on anyway, so higher efficiency would just mean less of the roof is taken up.